#include <stdio.h>
#define EXCELLENT 90
#define GOOD 80
#define AVERAGE 70
#define PASS 60

int main(){
	int score = 88;
	if (score >= EXCELLENT) {
	    printf("优秀\n");
	} else if (score >= GOOD) {
	    printf("良好\n");
	} else if (score >= AVERAGE) {
	    printf("中等\n");
	} else if (score >= PASS) {
	    printf("及格\n");
	} else {
	    printf("不及格\n");
	}

	/*if (score >= 90) {
	    printf("优秀\n");
	} else if (score >= 80) {
	    printf("良好\n");
	} else if (score >= 70) {
	    printf("中等\n");
	} else if (score >= 60) {
	    printf("及格\n");
	} else {
	    printf("不及格\n");
	}	
	*/
}